Motor drive controller for vehicle

Abstract

The present invention provides a motor drive controller for a vehicle having an engine and a motor disposed therein as a vehicle-propulsion system, the motor having both driving and power-generating functions, comprising: an engine controller for controlling a running state of the engine; motor controller for controlling both driving and power-generating states of the motor in a manner independent of control over the engine gained by the engine controller; engine speed-detector for detecting an engine revolution of the engine; and, engine load-detector for detecting an engine load. The motor controller includes a map defined by respective detection signals from the engine speed detector and the engine load-detector. The motor controller functions to provide alternative control between driving and power generation of the motor in response to a torque instruction value that is retrieved from the map.

The invention claimed is:  
     
       1. A motor drive controller for a vehicle having an engine and an electrical motor disposed therein as a vehicle propulsion system, the motor having both driving and power-generating functions, comprising: an engine controller for controlling a running state of the engine; a motor controller for controlling both a drive state and a power generation state of the motor independent from control of the engine by the engine controller; an engine speed-detector for detecting revolutions of the engine; and an engine load-detector for detecting load of the engine, the motor controller including a map defined by respective detection signals from the engine speed-detector and the engine load-detector, and the motor controller providing alternative control between driving and power generation of the motor in response to a torque instruction value preset in the motor controller that is retrieved from the map, wherein the map is one of a plurality of maps, one of the maps being provided therein for each gear position. 
     
     
       2. A motor drive controller according to  claim 1 , wherein the motor controller is connected to a group of detection sensors for detecting a state of a power source and service environments, and wherein the motor controller enables a torque instruction value retrieved from the map to be corrected on the basis of detection signals from the sensors. 
     
     
       3. A motor drive controller for a vehicle having an engine and an electrical motor disposed therein as a vehicle propulsion system, the motor having both driving and power-generating functions, comprising: an engine controller for controlling a running state of the engine; a motor controller for controlling both a drive state and a power-generation state of the motor independent from control of the engine by the engine controller; an engine speed-detector for detecting revolutions of the engine; and an engine load-detector for detecting load of the engine, the motor controller including a map defined by respective detection signals from the engine speed-detector and the engine load-detector, and the motor controller providing alternative control between driving and power generation of the motor in response to a torque instruction value that is retrieved from the map, 
       wherein the map defined by the respective detection signals from the engine speed-detector and the engine load-detector is further divided according to a vehicle velocity, thereby providing a subdivided map.